In astronomy, an equinox is either of two places on the celestial sphere at which the ecliptic intersects the celestial equator. Although there are two...

towards the March equinox, and it has a right-hand convention. It may be implemented in spherical or rectangular coordinates. The celestial equator and the...

the center of the Sun March equinox September equinox Equinox (celestial coordinates), either of two places on the celestial sphere at which the ecliptic...

celestial coordinate system widely used to specify the positions of celestial objects. It may be implemented in spherical or rectangular coordinates,...

containing Spring equinox All pages with titles containing Vernal equinox Equinox (disambiguation) Equinox (celestial coordinates) Autumnal equinox (disambiguation)...

system Hour angle Pole star Polar alignment Equatorial mount Equinox (celestial coordinates) Spherical astronomy Ecliptic Zodiac Orbital pole Stellar parallax...

centered at Earth's center, but fixed relative to the celestial poles and the March equinox. The coordinates are based on the location of stars relative to Earth's...

of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point in question above...

the equinox, the ecliptic coordinates of objects on the celestial sphere are continuously changing. Specifying a position in ecliptic coordinates requires...

connecting the centers of the Sun and Earth.The term "equinox" here refers to a point on the celestial sphere so defined, rather than the moment in time when...